TD Garden will be getting quite the facelift this summer. A privately funded, two-year, $70 million renovation project is set to begin at the home of the Boston Bruins and Boston Celtics. Among the changes in store for the 19-year-old arena are “a relocation and expansion of the Bruins’ Proshop, an overhaul of the concourses on levels four and seven, and renovations of the Garden’s concessions and the Legends Club,” according to The Boston Globe. Equipment will also be installed to offer free, arena-wide Wi-Fi to all fans — a project that is expected to be completed by the start of the 2014-15 Bruins season.